Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Hinge – Including means to hold or retard hinged members against...
Patent
1996-07-26
1998-07-28
Howell, Daniel W.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Hinge
Including means to hold or retard hinged members against...
16299, 16307, 297408, E05D 1108
Patent
active
057847592
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a hinge construction intended for use in circumstances in which it is required that a movable hinge member shall be capable of relatively free movement in one direction of rotation while resisting movement in the other direction.
While there may well be many applications for such an arrangement, it finds a useful application in connecting a head rest for a chair back in a situation in which it is required to be able to set the head rest at any desired angle in relation to the back. Under these circumstances it is desirable that the head rest shall be capable of being hinged forwardly in relation to the back relatively easily to a position in which it makes a desired angle with the back but will resist the weight of a person sitting in the chair and leaning his head back against the head rest. However, the construction must be such as to permit the head rest to be hinged backwardly by the exertion of greater pressure.
SUMMARY OF THE INVENTION
Accordingly, it is an object of present invention to provide a hinge construction, which avoids the disadvantages of he prior art.
The present invention consists in a hinge construction comprising a fixed hinge member and a movable hinge member fixed to a mandrel the mandrel being rotatably supported on the fixed hinge member, and a coil-spring one end of which is anchored to the fixed hinge member the other end being free, the coil spring closely surrounding the mandrel, the arrangement being such that movement of the movable hinge member in one direction rotates the mandrel in a sense acting to uncoil the coil-spring thus allowing free movement of the movable hinge member whereas movement of the movable hinge member in the opposite direction acts to cause the coil-spring to tighten about the mandrel and thus resist movement.
The present invention in another aspect consists in a chair having a base, a back attached thereto and a head rest attached at the top of the back by means of two or more hinge constructions as defined in the last proceeding paragraph.
In order that the nature of the invention may be better understood a preferred form thereof is hereinafter described by way of example with reference to the accompanying drawings.
BRIEF DESCRIPTION OF PREFERRED EMBODIMENTS
FIG. 1 is a perspective view of a hinge construction according to the invention; and
FIG. 2 is an exploded view showing the individual parts of the hinge construction.
FIG. 3 is a front view of a chair having a back with a head rest hingedly connected to the back in accordance with the invention.
DESCRIPTION OF PREFERRED EMBODIMENTS
The hinge construction illustrated in the drawings is intended for use in furniture as a means of, for example, attaching a head rest to the back of a chair or settee. It consists of a fixed hinge member 1 which is arranged for attachment to the back of the chair and a movable hinge member 2 having in it holes 3 by means of which it is attached to the head rest of the chair.
The movable hinge member 2 is welded to one end of a mandrel 4, one end 5 of which passes freely through the hole 6 in the fixed hinge member.
Around the central part 7 of the mandrel 4 a coil-spring 8 is wound so as to fit closely around the central part 1. One end 9 of the coil-spring is anchored in hole 10 in the fixed hinge member 1. The mandrel 4 is provided with an enlarged head 11 to hold the coil-spring 8 in place. The other end of the coil-spring B (not seen) is terminated close to the rear wall 12 of the fixed hinge member 1 and is free to move.
The arrangement is such that when the movable hinge member 2 is moved rearwardly in relation to the fixed hinge member 1 that is to say in a clockwise direction as seen when looking in the direction A of FIG. 1 friction between the central part 7 of the mandrel 4 and the coil-spring will cause the coil-spring to unwind thus permitting the movable hinge member to move freely. If on the other hand the movable hinge member 3 is moved in the other direction friction between the ma
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patent: 5018244 (1991-05-01), Hino
patent: 5028913 (1991-07-01), Kitamura
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patent: 5173837 (1992-12-01), Blackwell et al.
patent: 5197704 (1993-03-01), Kitamura
patent: 5219240 (1993-06-01), Kitamura
Howell Daniel W.
Striker Michael J.
Williams Mark
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